package com.crocodileq.utils;


import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Component;

import java.time.LocalDateTime;
import java.time.ZoneOffset;
import java.time.format.DateTimeFormatter;

/***
 * @Author 鳄鱼杆
 * @Date 2025/9/13 14:59
 */
@Component
public class RedisIdWorker {

    private StringRedisTemplate stringRedisTemplate;

    public RedisIdWorker(StringRedisTemplate stringRedisTemplate) {
        this.stringRedisTemplate = stringRedisTemplate;
    }

    //2000年的1月1日0时0分0秒的毫秒值
    private static final long BEGIN_TIMESTAMP = 1640995200L;

    public long nextId(String keyPrefix) {

        //生成时间戳
        LocalDateTime now = LocalDateTime.now();
        long nowSecond = now.toEpochSecond(ZoneOffset.UTC);
        long timestamp = nowSecond - BEGIN_TIMESTAMP;

        //生成序列号
        //获取当前日期
        String date = now.format(DateTimeFormatter.ofPattern("yyyy:MM:dd:HH"));

        //自增长
        long count = stringRedisTemplate.opsForValue().increment("icr:" + keyPrefix + ":" + date);

        //拼接返回
        return timestamp << 32 | count;
    }
}
